Dialysis catheter replacement connector

Abstract

The dialysis catheter replacement connector comprises a flow divider, a first catheter, a second catheter and a third catheter, one end of the first catheter and one end of the second catheter are communicated with one end of the third catheter through the flow divider, and the other end of the first catheter is provided with a one-way valve used for inserting a guide wire. The other end of the second catheter is provided with a second catheter connector used for being connected with a radiography syringe, and the third catheter is provided with a third catheter connector used for being connected with the shearing opening of the built-in catheter. According to the dialysis catheter replacement tube connector, radiography and placement of a guide wire into the body of a patient can be conducted at the same time, operation of a doctor is facilitated, operation risks are reduced, and medical safety is improved; the catheter infection probability in the catheter replacement process can be further reduced; the blood loss of a patient can be reduced, the surgical tolerance of the patient is improved, and the postoperative recovery time is prolonged; the medical experience of the patient can be improved, and the satisfaction degree of the patient is improved.

Description

Technical Field

[0001] The present invention relates to the field of medical auxiliary devices, and particularly to a dialysis catheter replacement connector. Background Art

[0002] The semi-permanent dialysis catheter is the ultimate vascular access for uremic patients to maintain life through hemodialysis. With the improvement of current dialysis medical technology and standardized chronic management, the dialysis age of uremic patients is gradually extended, and it is very common to have a dialysis age of more than 10 years. The service life of the semi-permanent dialysis catheter is 2 - 3 years. Due to reasons such as catheter infection, formation of a catheter fibrin sheath resulting in poor catheter flow and inability to meet dialysis requirements, and catheter cuff prolapse, it is necessary to replace the old semi-permanent dialysis catheter with a new one.

[0003] Currently, there are two conventional methods for replacing the semi-permanent dialysis catheter: One method is to insert a guide wire after disinfecting the external catheter 10, pull out the original semi-permanent dialysis catheter and then implant a new semi-permanent dialysis catheter. This catheter replacement method has a high probability of catheter infection; during the catheter replacement process, central venous angiography is required to understand the condition of the superior vena cava, then the catheter needs to be withdrawn to the brachiocephalic vein and the guide wire withdrawn (the matching guide wire is not enough for exchange). For patients with the superior vena cava approaching occlusion after withdrawing the catheter and guide wire, it is difficult to re-insert the guide wire or even the guide wire insertion fails, increasing the surgical difficulty. Another method is to cut the catheter from the internal catheter 20 (21 is the cut-off point), insert a guide wire, pull out the original semi-permanent dialysis catheter and then implant a new semi-permanent dialysis catheter. This method can reduce the probability of catheter replacement infection, but since the original dialysis catheter inserted into the body after cutting cannot be blocked, it causes blood loss in the patient; during the catheter replacement process, central venous angiography is required to understand the condition of the superior vena cava, and due to the inability to block the cut catheter, it leads to blood loss in the patient. And the second method is the commonly used method for catheter replacement. Summary of the Invention

[0004] The purpose of the present invention is to provide a dialysis catheter replacement connector to solve the above problems.

[0005] To achieve the above purpose, the present invention discloses a dialysis catheter replacement connector, including a shunt, a first catheter, a second catheter, and a third catheter. One ends of the first catheter and the second catheter are connected to one end of the third catheter through the shunt. The other end of the first catheter is provided with a one-way valve for inserting a guide wire. The other end of the second catheter is provided with a second catheter connector for connecting a contrast syringe. The third catheter is provided with a third catheter connector for connecting the cut-off point of the internal catheter.

[0006] Further, a buckle for closing is sleeved on the second catheter.

[0007] Further, the second catheter connector is a detachable nut.

[0008] Further, the third catheter connector is a conical plug that can be inserted into the shearing opening, and the outer diameter of the conical plug gradually increases backward from the insertion end.

[0009] Further, a clamping convex ring is provided on the outer wall of the conical connector.

[0010] Further, a plurality of the clamping convex rings are evenly distributed along the axial direction of the conical connector.

[0011] Compared with the prior art, the advantages of the present invention are as follows:

[0012] The catheter replacement connector of the present invention can simultaneously perform angiography and guide wire insertion into the patient's body, facilitating the operation of physicians, reducing the surgical risk, and improving medical safety; further, it can reduce the probability of catheter infection during the catheter replacement process; it can reduce the blood loss of patients, improve the tolerance of patients to surgery and the postoperative recovery time; it can also improve the patient's medical experience and satisfaction.

[0013] Hereinafter, the present invention will be described in further detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings constituting a part of this application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0015] Figure 1 is a schematic diagram of the shearing structure of the dialysis catheter;

[0016] Figure 2 is a schematic diagram of the catheter replacement connector of the dialysis catheter disclosed in the preferred embodiment of the present invention.

[0017] Legend:

[0018] 1, shunt; 2, first catheter; 3, second catheter; 4, third catheter; 5, one-way valve; 6, second catheter connector; 7, third catheter connector; 71, clamping convex ring; 8, buckle; 10, external catheter; 20, internal catheter; 21, shearing opening. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The following will describe the embodiments of the present invention in detail with reference to the accompanying drawings, but the present invention can be implemented in many different ways defined and covered by the claims.

[0020] As Figure 2As shown in the figure, the present invention discloses a catheter replacement connector for dialysis. A catheter replacement connector for dialysis includes a shunt 1, a first catheter 2, a second catheter 3, and a third catheter 4. One ends of the first catheter 2 and the second catheter 3 are connected to one end of the third catheter 4 through the shunt 1. Specifically, a flow channel is provided inside the shunt 1, so as to realize the fixation of one ends of the first catheter 2, the second catheter 3, and the third catheter 4, and to realize the connection between the first catheter 2 and the second catheter 3 above and the third catheter 4 below. The other end of the first catheter 2 is provided with a one-way valve 5 (a commercially available existing structure) for inserting a guide wire. The other end of the second catheter 3 is provided with a second catheter connector 6 for connecting a contrast syringe. The third catheter 4 is provided with a third catheter connector 7 for connecting to the cut-off port 21 of the built-in catheter 20. After the cut-off port 21 of the built-in catheter 20 is cut off, the catheter replacement connector for dialysis is connected through the third catheter connector 7, so as to facilitate the insertion of the guide wire through the one-way valve 5 of the first catheter 2, and also facilitate the connection of the syringe through the second catheter connector 6 for contrast imaging, which is convenient for doctors to operate, reduces the surgical risk, and improves medical safety; further, it can reduce the probability of catheter infection during the catheter replacement process; it can reduce the blood loss of patients, improve the tolerance of patients during the operation and the postoperative recovery time; it can also improve the medical experience of patients and the satisfaction of patients. It has multiple benefits and is convenient for popularization and application.

[0021] In this embodiment, a buckle 8 for closing is sleeved on the second catheter 3. The buckle 8 is a commercially available existing annular extrusion type clamping structure, so as to facilitate the closing of the second catheter 3 during the contrast imaging process.

[0022] In this embodiment, in order to facilitate the prevention of pollution of the second catheter 3 and the quick connection of the syringe, the second catheter connector 6 is a detachable nut. The end of the second catheter 3 is provided with a hard external threaded tube, so as to be spirally connected with the internal threaded hole of the second catheter connector 6. The nut can be hung on the second catheter 3 through a connecting wire to prevent the problem that the second catheter connector 6 is easily lost after rotating and detaching.

[0023] In this embodiment, the third catheter connector 7 is a tapered plug that can be inserted into the cut-off port 21, and the outer diameter of the tapered plug gradually increases from the insertion end backward. Thus, the tapered plug entering the third catheter 4 can better fit the inner wall of the cut-off port 21 during the process of expanding outward by extrusion, and then completely seal the cut-off port 21 to avoid blood loss.

[0024] In this embodiment, in order to further improve the sealing effect, a clamping convex ring 71 is provided on the outer wall of the tapered connector. The clamping convex rings 71 are evenly distributed along the axial direction of the tapered connector in multiple numbers. Through the clamping convex rings 71, it can better prevent the third catheter connector 7 from detaching from the inner hole of the cut-off port 21, and improve the connection and sealing effect.

[0025] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A dialysis catheter replacement connector, characterized in that, It includes a shunt (1), a first catheter (2), a second catheter (3) and a third catheter (4). One ends of the first catheter (2) and the second catheter (3) are communicated with one end of the third catheter (4) through the shunt (1). A check valve (5) for inserting a guide wire is provided at the other end of the first catheter (2). A second catheter joint (6) for connecting a contrast injector is provided at the other end of the second catheter (3). A third catheter joint (7) for connecting a severing opening (21) of an internal catheter (20) is provided on the third catheter (4).

2. The dialysis catheter tube replacement adapter according to claim 1, characterized in that, A buckle (8) for closing is sleeved on the second catheter (3).

3. The dialysis catheter replacement connector according to claim 1, characterized in that, The second catheter joint (6) is a detachable nut.

4. The dialysis catheter replacement connector according to claim 1, wherein, The third catheter joint (7) is a conical plug that can be inserted into the severing opening (21), and the outer diameter of the conical plug gradually increases backward from the insertion end.

5. The dialysis catheter replacement connector according to claim 4, wherein, A clamping convex ring (71) is provided on the outer wall of the conical joint.

6. The dialysis catheter replacement connector according to claim 5, characterized in that, The clamping convex rings (71) are evenly distributed along the axial direction of the conical joint into a plurality.

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